A harmonious society is like a symphony orchestra—each person contributes a small sound，but when with other sounds，it bees beautiful music.
A. bining
B. being bined
C. bined
D. to be bined
网友回答
A. bining
B. being bined
(答案→)C. bined
D. to be bined
解析：句意：和谐社会就像一个管弦乐队——每个人奏出一个音，但是当和其他音和在一起时，就成了美丽的乐章。在时间、条件、让步状语从句中，若主从句主语一致，从句谓语含有动词be，可以把从句中的主语和be动词一起省略。when从句补充完整为：when it is bined with other sounds，所以C项正确。